Your problem is that you prefer empathy to non-empathy. Non-violence to violence. That's a value judgment that has no merit in the Darwinian model.

An objective Darwinian scientist is indifferent to empathy and suffering. If either response by an animal provides a competitive advantage, to the Darwinist, that is the "right" behavior.

If you want to extend the Darwinian social model to humans, well then, there you go...